Finding the Fourth Proportional to 78,049.56, 107,708.40 and 42,239.83

Step by Step Solution

1. Step 1: Write the proportion equation
   78,049.56 : 107,708.40 = 42,239.83 : x
2. Step 2: Convert to fraction form
   78,049.56/107,708.40 = 42,239.83/x
3. Step 3: Cross multiply
   78,049.56x = 107,708.40 × 42,239.83
4. Step 4: Simplify right side
   78,049.56x = 4,549,584,505.57
5. Step 5: Solve for x
   x = 4,549,584,505.57/78,049.56
6. Step 6: Final answer
   x = 58,290.97